We get it: The moment that dishwasher is open, you want to toss everything in and hit start. You'd be wise, however, to pause before stacking your favorite chef's knife or cutting board inside.

The extreme heat and powerful wash cycles can seriously damage your gear. We're talking warping, rust, dulling, and cracking -- issues even "dishwasher-safe" items aren't always immune to.

Whether you're breaking in a new dishwasher or you're a veteran of automated cleaning, the urge to cram everything inside can lead to heartbreak later.

So before you run that next cycle, double-check what you're tossing in. Your knives , skillets and stemware will thank you.

11 things you should never put in the dishwasher

1. Insulated mugs

Insulated mugs can be damaged by the press

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